Twitterbation (noun) An act of social masturbation in which one retweets trivial @replies directed toward one's self that offer no apparent benefit to one's social status.
Accounts for approximately 98% of posts on twitter.com.

Related forms:
twitt-er-bate - to engage in twitterbation
twitt-er-ba-tor - one who engages in incessant twitterbation
twitt-er-ba-to-ry - a twitter post that displays the fundamental qualities of twitterbation

"Have you been reading Greg's retweets lately? He's been blowing his @reply load all over the place!"
"Indeed, Carla. It seems to be a classic case of Twitterbation."